Improvement in lard-coolers



w.1. WILCUX.

Lard-Coolers.

Patented Jan. 27, 1874.

WITNESSES ATTORNEYS.

9 m 0 M a m a W M a n.

UNITED STATES PATENT CFFIOE.

\VILLIAM J. *ILCOX, OF PATERSON, NEV JERSEY.

IMPROVEMENT IN LARD-COOLERS.

Specification forming part of Letters Patent No. 146,852, dated January 27, 1874; application filed December 1, 1873.

To all whom it may concern:

' State of New Jersey, have invented a. new

and Improved Lard-Agitator, of which the following is a specification:

To make a strictly prime article of lard, it is necessary to stir or agitate it to a certain extent while it is cooling after having been rendered or melted by heat. To accomplish the work with sufficient rapidity for the demands of large works it is usual to employ large circular cooling and stirring tanks ten or twelve feet in diameter, in which a vertical heater or stirrer is made to revolve. Sometimes two stirrers are used running in opposite directions to each other. In other cases large rectangular tanks, with two or more reciprocating rakes or stirrers working toward and from each other, are employed. In these latter arrangements the action is not regular and uniform, but is double or nearly so at and about the meeting-point of the rakes to what it is along where the rakes are most separate and independent of each other, and, in the case of the revolving agitators, the action is far greater in the outer portions of the tank, where the speed of the heaters is greatest, than it is in the middle portion, where the speed is very slow. If stirred too slow the lard becomes grained, and if too fast it be comes frothy; therefore, it is highly important that .the action be equal throughout the mass.

To remedy these defects, and produce the most uniform action, I propose to employ, say, two revolving agitators, turning on their own axes, while at the same time revolving around the axis of the tank, the said agitators being on opposite sides of the axis of the tank, by which I find the action is very nearly equal throughout all parts of the tank. Four of said agitators may be used as well, two being in a line at right' angles to the line of the other two; but generally two only will be sufficient.

The invention will first be fully described, and then pointed out in the claim.

Figure l is a sectional elevation of my improved machine. Fig. 2 is a horizontal section of Fig. 1 taken on the line or w; and Fig. 3 is a horizontal section taken on the line y 3 Similar letters of reference indicate corresponding parts.

A represents the cylindrical tank for holding the lard to be cooled and agitated. B the revolving frame within it; 0, the shaft in the axis of the tank, to which the frame B is attached to be revolved, said shaft extending up through the top of the tank, and gearing, by the wheel D and pinion E, with the drivin g=shaft F. G represents the agitators, which are mounted on the frame B, one each side of shaft 0, to be carried around the tank. At the upper end they gear, by a pinion, H, with a stationary wheel, I, fixed on the frame J, to cause the stirrers to revolve on their axes at the same time that they are carried around the shaft 0. K represents scrapers in the edges of the revolving frame B, and L springs to press them out against the side of the tank to scrape off the lard which collects thereon by the cooling process. Such scrapers may also be used in the bottom of the frame B.

Having thus described my invention, I claim as new and desire to secure by Letters Patcut- The series of stirrers G revolving on their own axes, and also revolving with the frame 13 on the axis of the latter, in the manner and for the purpose described.

WVILLIAM J. VVILOOX.

Witnesses:

A. P. THAYER, T. B. MosHER. 

